Tool for making dynamo electric machine elements



May 28, 1935. v, G. APPLE 2,002,562

l TOOL FOR MAKING DYNAMO ELECTRIC MACHINE E LEMENTS Original Filed June 10, 1929- /NVENTOK PatentedMay 28,1935

TooL Fon MAKING DYNAMO `ELECTRIC MACHINE ELEMENTS Vincent G. Apple, deceased,` late of Dayton, Ohio,

Aby Herbert F. Apple, Edward M. Apple, and Gourley Darroch, executors, Dayton, Ohio` n Qriginal application June 10, 1929, Serial No.

Y 369,564. Patent No. 1,934,903, dated November n 14, 1933. Divided and this application November 1, 1933, Serial No. 696,288

.1 claim. (o1. .e9-s4) This invention is a .division of a co-pending application S. N. 369,564. and patented Nov. 14, 1933, No. 1,934,903 and relates to tools for mak.- ing dynamo electric machine elements of the type comprising a hollow cylindrical core 'with a winding disposed in a series of slots spaced about its inner circumference.

The object of the invention is to provide a tool to facilitate placing and aixing the winding in the slots.

The process by which this object is attained, together with the tool and the manner of `using it, is hereinafter specifically described, reference being had to the drawing, wherein Fig. l shows a perspective View of the core. y

Fig. 2 shows one of the coils as rst formed.

Fig. 3 shows one of the coils as reshaped and further insulated.

Fig. 4 shows one of the coils in process of being entered into the slots of the core.

Fig. 5 shows the assembled core and coils.

Fig. 6 is a perspective View of the tool for seating and aliixing the coils in the slots.

Fig. '7 is an axial section through the core and coils assembly with the tool in use.

Similar numerals refer to similar parts throughout the several views. p

The core I is composed of a plurality of laminas II. A central opening I2 has winding slots I3 spaced apart by teeth I4 around its circumference. To adapt the core to a bipolar winding two teeth are shortened as at I6.

Two coils I1 are required,` oneV of which is 'shown in Fig. 2. These coils are preferably wound of a 35, single piece of fibrous covered wire starting at I8 and ending at I9, and are wound in three interconnected sections 2I, 22 and 23, joined together at 24 and 26. Before they are wound the fibrous covering on the wire is preferably saturated and coated with a liquid cementitious insulation and dried to suchV a degree that it may be conveniently handled but not to an extent to make the coating brittle.

Before the coils I1 are placed on the core they are preferably reshaped and further insulated. Fig. 3 shows a cross section through a reshaped core I1 which is ready for assembly with the core Ill, the several sections having been formed so that the end turns 28,are of semi-circular contour, but the coil sides 32 are straight. The coil sides 32 are pressed to atten them, preferably after the core slot linings comprising U shaped pieces of insulation treated fabric 34 are lapped` of the Usto make the cross section of the coil sides narrower but higher.

Fig. 4 shows the core IU after one of the reshaped coils I1 has had the coil sides 32, Fig. 3, entered in the core Yslots I3. After the coil sides 5 are pressed downwardly into the slots as far as possible by hand, the free ends of the U shaped slot liners are lapped over each other as at36, although the lapped over ends may bulge from the slots and extend slightly above the ends of 10 the core teeth I4. p

Fig. 5 shows the core I0 with the entire winding assembled therein, and all ofthe free ends of the U shaped insulation treated fabric slot liners 34 lapped over each other as at 36, in which condition it is ready to have the tool 31, Fig, 6, applied.

The tool 31, Figs. 6 and 7 comprises a base V38 having as many equally spaced radial slots 39 in its upper surface as there are teeth in the core I0; A cover plate 4I is secured tothe base 38 by screws 42. This cover plate converts the slots 39 into substantially square, radially extending tunnels. L shaped jaws have the lower horizontal portion 43 of the Lsslidably fitted to these tunnels 39 so that the jaws have radial movement relative to the base 38. The Vertical legs 44 of the L shaped jaws have one edge 46 somewhat s lanting so that the space within the set of jaws, when all are in place, tapers from the top 30 downwardly. A tapered plug 41 has shallow equally spaced longitudinal slots 48 and the slanting edges 46 of the jaws extend slightly into these slots. It will be seen that vertical movement of the plug 41 will produce simultaneous radial movement of the jaws.

When a core and coil assembly has been prepared as in Fig. 5, it is placed over the tool 31 as shown in Fig. 7 with the vertical leg 44 of a jaw over the entrance of each slot I3 against the lapped over ends 33 of the slot liners 34. The plug 41 is then pushed downward until the jaws 44 extend slightly into the entrances of the core slots as at 49. Without removing the tool 31 the core and coils assembly shown in Fig. 7 is now heated so that the coatings of cementitious insulation on the wire will rst unite into a single mass, and then, by continued applications of heat, the mass with the wire imbedded in it will be hardened. When the insulation mass is suflir ciently hard theV tool 31`is removed.

When the core and coils assembly is separated from the tool 31 the coils are rigid, and the end turns 23 may not again be displaced, and the coil. sides 32 will not again expand and extend `claimed the tool 3l which is the subject of the present application. The claim in thevpresent. application is, therefore, confined to the tool 31 herein shown.

What is claimed is: f

A coil seating tool of the character described. comprising a base, a pluralityv of horizontally t ing jaw portions disposed radial grooves in said base, a plurality of radially movable jaws slidably secured in said grooves, said jaws having vertically extending parts at their inner ends arranged in the form of a cylindrical cage, said vertically extending parts being Wider at the base than at the upper end the outer edges of said parts all being parallelvto the axis and the inner edges at an angle thereto, and a downwardly movable center plug having grooves on its outer face tted to the inner tapered edges of the said vertically extend- HERBERT F. APPLE, EDWARD M, APPLE,

v A GOURLEY DARROCH, Eecutors for Vincent G. Apple, Deceased. 

